问几道高二数列题,1、(1)在等差数列{an}中,d=1,且a1+a3+a5+……+a99=66,求S100=(2)在等比数列{an}中,q=2,且a1+a3+a5+……+a99=66,求S100=2、(1)在等差数列{an}中,S10=10,S20=40,则S40=(2)在等比数列{an}中,
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